Is there any point to playing the arcade game in the bar?
You get achievements. And the text of the achievements would seem to suggest it can be beat.
- Terra-tron Terrorized! (10) Beat the Terra-tron on the Lost Viking arcade machine.
- Lost Viking: Bronze (10) Score 125,000 points on the Lost Viking arcade machine.
- Lost Viking: Silver (10) Score 250,000 points on the Lost Viking arcade machine.
- Lost Viking: Gold (10) Score 500,000 points on the Lost Viking arcade machine.
Source
If you load the "Maw of the Void Victory" autosave then it will load a cinematic that you can skip and it will bring you straight to the bridge.